In Las Pinas city of southern Manila, people waded through ankle-deep water during the morning commute.

The floods have cut electricity services in some areas, as well as mobile phone signals.

People in the city who on Tuesday had moved into temporary evacuation shelters were still relying on relief goods provided by the government, and waiting until the floodwaters recede so they can return to their homes.

A police officer said authorities were on alert as thieves might try to enter houses abandoned by residents who went to the shelters.

In Quezon City of northeastern Manila, hundreds of people were sheltering in an evacuation centre in Barangay Bagong Silangan, which is situated near a river and regarded as flood-prone.

Around 830 people were staying in the shelter. Local district officials gave food, blankets and sleeping mats to evacuees there.

Tropical Storm Henry (Son-Tinh) Tuesday passed across the far north of the Philippines and out of its area of responsibility, however it brought heavy southwesterly monsoon rains which continue to drench the country.

The National Disaster Risk Reduction and Management Council warned in a bulletin Wednesday of monsoon rains in the area around Manila and Central and Northern Luzon, as well as possible flooding and landslides.

The Philippine Atmospheric, Geophysical and Astronomical Services Administration warned of gale-force winds up to 63km/h and very rough sea conditions along the western seaboard of Central and Southern Luzon.

Every year at least a dozen typhoons sweep through the area around the Philippines, bringing heavy rains and floods.

Australian Associated Press